Effect of nitric acid modification of montmorillonite clay on synthesis of solketal from glycerol and acetoneстатья
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Дата последнего поиска статьи во внешних источниках: 13 февраля 2017 г.
Авторы:
Timofeeva M.N.,
Panchenko V.N.,
Krupskaya V.V.,
Gil A.,
Vicente M.A.
Аннотация:Theeffectofacidmodification of a natural montmorillonite clay (MM) by HNO3on the catalytic properties of MM from Dash-Salakhlinsk (Kazakhstan) has been investigated in the synthesis of solketal from glycerol and acetone in solvent free and acetonitrile media. HNO3concentration allowed to control the chemical composition, the sur-face acidity, the porous structure of the acid-activated MMs and their catalytic performance. The main reaction product was solketal with 86.6–98% selectivity. Conversion of glycerol depended on the Brønsted acidity. The most active sample, namely, MM activated with 0.5 mol/dm 3 HNO3, showed good reusability for 3 catalyst cycles.